US 12,272,926 B2
DC-coupled laser diode driver circuit with large modulation current
Jinghu Li, Xiamen (CN); Zhicong Luo, Xiamen (CN); and Hanghui Tu, Xiamen (CN)
Appl. No. 17/621,421
Filed by XIAMEN EOCHIP SEMICONDUCTOR CO., LTD, Xiamen (CN)
PCT Filed Jun. 18, 2021, PCT No. PCT/CN2021/100963
§ 371(c)(1), (2) Date Dec. 21, 2021,
PCT Pub. No. WO2022/028128, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 202010767443.9 (CN), filed on Aug. 3, 2020.
Prior Publication US 2022/0360042 A1, Nov. 10, 2022
Int. Cl. H01S 5/042 (2006.01); H01S 5/068 (2006.01)
CPC H01S 5/0427 (2013.01) [H01S 5/06808 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A DC-coupled laser drive circuit with large modulation current, comprising: a negative feedback unit, an adaptive drive unit, a mirrored tail current source, a resistor R11, a resistor R12, a bias current source IBIAS and a diode D2,
the resistor R12, thea laser D1, the resistor R11, and the bias current source IBIAS are connected in series between thea voltage VCC and a ground in sequence;
an input terminal of the negative feedback unit is connected to data signal input ports TINP and TINN, an output terminal of the negative feedback unit is connected to an input terminal of the adaptive drive unit, an output terminal of the adaptive drive unit is connected to a control signal input terminal of the mirrored tail current source, a drive signal output terminal of the mirrored tail current source is connected to an anode of the laser D1 through a diode D2, and another drive signal output terminal of the mirrored tail current source is connected to a cathode of the laser D1.